662 
ZOOLOGICAL LlTliKATUllE. 
central boss 2 millims. } disk ? (it was wanting in the only specimen 
found). O. indiviaus, sp. n., Semper, 1. c. p. 68, Pandanon, near Bohol, Philip- 
pines, at a depth of 30 fathoms. 
Comatula {Alecto) hageniiy sp. n., Pourtales, 1. c. p. Ill, off Sand Key, 
100 fathoms; C, (Antedon) hrevipinna, sp. n., Pourtales, 1. c. p. Ill, off Ha- 
vana, 270 fathoms. 
Antedon sarm. Sara (/. c.) describes the peutacrinoid stage of this species ; 
the early stages of development had been observed in 1864, but appear not 
to differ in any material respect from tliose described in A. rosacea by 
Wyville Thomson. 
Ophiukoidea. 
Ophiolepis adspersa, sp. n., Grube, /. c. p. 44. 
Amphiura plamspina, sp. n., Martens, 1. c. p. 347, Rio Janeiro. 
Opkiocoma ocellata^ sp. n.. Martens, 1. c. p. 345, Cape York. 
Ophiothrix roseo-cceridans, sp. n., O. melanostictcij sp. n., O. striolata, sp. n., 
Grube, 1. a. p. 46 ; the first from St. Helena, and all three from the Chinese 
Sea. — Ophiothrix purpureuy sp. n.. Martens, /. c. p. 346, Amboina ; O. viridi- 
alha, sp. n., Martens, /. c. p. 347, Chinese Seas. 
Hemieuryale, g. n.. Martens, 1. c. p. 484. Arms prehensile, single. Dorsal 
surface of the disk and the arms granular, without shields. Sides of the 
arms bordered by a row of large protuberances; the undersides of the arms 
with shields, and outside of these oblique rows of short teeth. No special 
madreporic tubercle. Two genital splits on the under surface by the side of 
the oral shields. The oral margins beset with papillae. No true teeth. 
It will be seen that in this remarkable genus, while the arms are prehensile, 
as in Euryale, the under surface of the arms is provided with Ophiura- 
like shields. H. pustulata, sp. n.. Martens, /. c. p. 484, figs 2, a West 
Indies. 
Asirophyton Icevipelky sp. n., Grube,/. c. p. 44; perhaps only a variety of A. 
asperum. The West Indies. 
Astehoidea. 
Asterias atlanticay sp. n., Verrill, 1. c. p. 368. One specimen with eight 
rays from the Abrolhos reefs ; another with six rays from Bermuda. 
Pentaceros (Nidorellia) armatus, Gray. Verrill (/. c. p. 372) gives the 
following synonymy: — Oreaster armatus, Mull. & Tros. ; O. conifer, Mobius; 
Qoniodiscus armatus, IMt, Nidorellia armata, Verrill; Goniodiscus stella, 
Verrill (young). ' 
Echinaster {^Othilia) crassispina, sp. n., Verrill, 1. c. p. 368, pi. 4. fig. 7, 
Bahia, Brazil. 
Amphiaster, g. n., Verrill, /. c. p. 372. Disk moderately developed, flat 
above and below, with five broad triangular rays and two well-developed 
series of marginal plates. Skeleton of the upperside formed by regular, 
polygonal, spine-bearing tessellated plates, with pores between them ; on the 
lower side composed of smaller granulated plates, each bearing a tubercle. 
Marginal plates granulated around the margin, smooth at centre or bearing 
a large smooth spine. Interambulacral plates bearing a row of smaller, 
inner spines, several on each plate, and an outer series of larger ones, one to 
each plate. This genus differ^ from Greasier in its depressed form, tessellated 
polygonal j)lates, character of .sj>ines ; iVom Xidorcilia iii the larger and less 
